//
//  ViewController.m
//  03-UIGestureRecognizer
//
//  Created by QC.L on 16/7/18.
//  Copyright © 2016年 QC.L. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    // 手势识别器 UIGestureRecognizer
    // UIGestureRecognizer 作为所有手势的基类(父类)
    // 分为7种
    // 1.轻拍 Tap
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];
    // 点击几次触发方法, 默认为1
    tap.numberOfTapsRequired = 1;
    // 几个手指触发 (按option - alt) 默认为1
    tap.numberOfTouchesRequired = 1;
//    [self.view addGestureRecognizer:tap];
    // 2.长按 longPress
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressAction:)];
    // 长按几秒后开始, 默认 0.5s
    longPress.minimumPressDuration = 1;
    // 默认10像素, 长按失败前, 最大的移动距离
    longPress.allowableMovement = 10;
    [self.view addGestureRecognizer:longPress];
    // 3.轻扫 Swipe
    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeAction:)];
    // direction可以设置多个, 前提多个方向所触发的行为要相同
    // 如果多个枚举方向触发的行为不同, 需要创建多个轻扫的手势
    // 左右 与 上下有冲突
    swipe.direction = UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight;
//    [self.view addGestureRecognizer:swipe];
    // 练习: ImageView添加轻扫换图
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 355, 647)];
    imageView.image = [UIImage imageNamed:@"02"];
    // 将图片的交互打开
    imageView.userInteractionEnabled = YES;
//    [self.view addSubview:imageView];
    
    UISwipeGestureRecognizer *swipeChangeImageRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeChangeImageRight:)];
    // 按位枚举, 4个选项 -> 1 1 1 1
    // 全选的情况 1(3) 1(2) 1(1) 1(0)
    swipeChangeImageRight.direction = UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionUp;
//    [imageView addGestureRecognizer:swipeChangeImageRight];
    UISwipeGestureRecognizer *swipeChangeImageLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeChangeImageLeft:)];
    swipeChangeImageLeft.direction = UISwipeGestureRecognizerDirectionLeft;
//    [imageView addGestureRecognizer:swipeChangeImageLeft];
    // 4.平移 Pan
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];
    [imageView addGestureRecognizer:pan];
    // 5.捏合 Pinch
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];
    [imageView addGestureRecognizer:pinch];
    // 6.旋转
    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationAction:)];
    [imageView addGestureRecognizer:rotation];
    // 7.屏幕边缘手势
    UIScreenEdgePanGestureRecognizer *screenEdgePan = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(screenEdgePan:)];
    screenEdgePan.edges = UIRectEdgeLeft;
    [self.view addGestureRecognizer:screenEdgePan];
}
// 轻拍
- (void)tapAction:(UITapGestureRecognizer *)tap {
    NSLog(@"轻拍");
}
// 长按
- (void)longPressAction:(UILongPressGestureRecognizer *)longPress {
    if (longPress.state == UIGestureRecognizerStateBegan) {
        NSLog(@"长按开始");
    } else if (longPress.state == UIGestureRecognizerStateEnded) {
        NSLog(@"长按结束");
    }
}
// 轻扫
- (void)swipeAction:(UISwipeGestureRecognizer *)swipe {
    NSLog(@"轻扫");
}

- (void)swipeChangeImageRight:(UISwipeGestureRecognizer *)swipe {
    UIImageView *imageView = (UIImageView *)swipe.view;
    imageView.image = [UIImage imageNamed:@"01"];
}

- (void)swipeChangeImageLeft:(UISwipeGestureRecognizer *)swipe {
    UIImageView *imageView = (UIImageView *)swipe.view;
    imageView.image = [UIImage imageNamed:@"02"];
}
// 平移
- (void)panAction:(UIPanGestureRecognizer *)pan {
    if (pan.state == UIGestureRecognizerStateBegan) {
        // 平移开始
    } else if (pan.state == UIGestureRecognizerStateChanged) {
        // 平移中
        // 平移手势, 根据其他View上移动的过程, 得到最终点
        CGPoint point = [pan translationInView:pan.view];
        // 根据Point使pan.view移动
        pan.view.transform = CGAffineTransformTranslate(pan.view.transform, point.x, point.y);
        // pan移动的点置空
        [pan setTranslation:CGPointZero inView:pan.view];
    } else if (pan.state == UIGestureRecognizerStateEnded) {
        // 平移结束
        pan.view.transform = CGAffineTransformIdentity;
    }
}
// 捏合手势
- (void)pinchAction:(UIPinchGestureRecognizer *)pinch {
    NSLog(@"%f", pinch.scale);
    pinch.view.transform = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);
    // 设置缩放倍数为1
    pinch.scale = 1;
}
// 旋转
- (void)rotationAction:(UIRotationGestureRecognizer *)rotation {
    // 转换中, 根据上次转换继续改变
    rotation.view.transform = CGAffineTransformRotate(rotation.view.transform, rotation.rotation);
    // 旋转的弧度置为0
    rotation.rotation = 0;
}

- (void)screenEdgePan:(UIScreenEdgePanGestureRecognizer *)screenEdgePan {
    NSLog(@"屏幕边缘手势");
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end
